<template>
    <div class="todo-footer">
        <label>
            <input type="checkbox" v-model="isAll"/>
        </label>
        <span>
            <span>已完成{{ checkTotal }}</span> / 全部{{ All }}
        </span>
        <button class="btn btn-danger" @click="deleteAll">清除已完成任务</button>
    </div>
</template>

<script>
export default {
    name: 'MyFooter',
    props:['todos','checkedAlltodoObj','deleteAlltodo'],
    computed:{
        checkTotal(){
            return this.todos.reduce((pre,current)=>pre+(current.done? 1:0),0)
        },
        All(){
            return this.todos.length
        },
        isAll:{
            get(){
                return this.checkTotal===this.All && this.All>0
            },
            set(value){
                this.checkedAlltodoObj(value)
            }
        }
    },
    methods:{
        // isChecked(e){
        //     console.log(e.target.checked);
        // }
        deleteAll(){
            this.deleteAlltodo();
        }
    }
}
</script>

<style scoped>
/*footer*/
.todo-footer {
    height: 40px;
    line-height: 40px;
    padding-left: 6px;
    margin-top: 5px;
}

.todo-footer label {
    display: inline-block;
    margin-right: 20px;
    cursor: pointer;
}

.todo-footer label input {
    position: relative;
    top: -1px;
    vertical-align: middle;
    margin-right: 5px;
}

.todo-footer button {
    float: right;
    margin-top: 5px;
}
</style>